Filter for methanol engine

Abstract

The utility model relates to the technical field of filters, and provides a filter for a methanol engine, which comprises a shell, wherein the shell is provided with an inner cavity, an oil inlet and an oil outlet; the first filtering assembly comprises a first support and a moisture adsorption part, the first support divides the inner cavity into a first filtering cavity and a second filtering cavity, the moisture adsorption part wraps the first support, and the first filtering cavity communicates with the oil inlet; the second filtering assembly comprises filter paper, a second support and an additive box, the additive box is provided with an oil passing channel, the oil passing channel is communicated with the oil outlet and the interior of the second support, the filter paper wraps the second support and the additive box, the second support and the additive box isolate a third filtering cavity in the second filtering cavity, and the third filtering cavity is communicated with the oil outlet. By means of the technical scheme, the problem that when an existing filter is applied to a methanol engine, lubricating oil contains water in the recycling process, and consequently the lubricating performance is reduced is solved.

Description

Technical Field

[0001] This utility model relates to the field of filter technology, specifically to a filter for methanol engines. Background Technology

[0002] Methanol fuel, as a new energy source in recent years, has been widely promoted in many key areas of my country due to its superior economic and environmental performance. After combustion, methanol fuel releases carbon dioxide and water, solving the difficulty and complexity of after-treatment, and has gained high market recognition. However, some unburned methanol and some water produced by combustion will enter the crankcase in the form of steam. When the temperature drops, the water vapor will condense into liquid water and mix into the lubricating oil, causing the lubricating oil to emulsify and reduce its lubrication performance. At the same time, the presence of water will corrode metal parts and reduce the strength of the oil film, which will greatly affect the lubrication effect.

[0003] Therefore, a new type of filter is needed. Utility Model Content

[0004] This invention proposes a filter for methanol engines, which solves the problem that existing filters, when applied to methanol engines, suffer from reduced lubrication performance due to moisture in the lubricating oil during circulation.

[0005] The technical solution of this utility model is as follows: A filter for a methanol engine, comprising:

[0006] The housing has an inner cavity, an oil inlet, and an oil outlet, wherein the oil inlet and the oil outlet are both connected to the inner cavity;

[0007] A first filter assembly is located in the inner cavity. The first filter assembly includes a first support and a moisture absorbent. The first support separates the inner cavity into a first filter chamber and a second filter chamber. The moisture absorbent wraps the first support and is used to absorb moisture in the lubricating oil. The first filter chamber is connected to the oil inlet.

[0008] A second filter assembly is located within the second filter chamber. The second filter assembly includes filter paper, a second support, and an additive box. The additive box has an oil passage, one end of which is connected to the oil outlet, and the other end is connected to the interior of the second support. The filter paper wraps around the exterior of the second support and the additive box. The second support and the additive box isolate a third filter chamber within the second filter chamber. The third filter chamber is connected to the oil outlet. The additive box has a filling chamber, a filling inlet, and a filling outlet. The filling inlet is connected to the exterior of the additive box and the filling chamber, and the filling outlet is connected to the filling chamber and the oil passage.

[0009] When the lubricating oil flows through the interior of the additive tank, it carries the corrosion inhibitor into the oil passage.

[0010] As a further technical solution, there are multiple feeding inlets and multiple feeding outlets.

[0011] As a further technical solution, the number of feeding inlets is greater than the number of feeding outlets.

[0012] As a further technical solution, a drainage component is also included. The housing further has a drain outlet that communicates with the second filter chamber. The drainage component includes:

[0013] A liquid level sensor is installed at the drain outlet;

[0014] A spring is located inside the second filter chamber. The spring is sleeved outside the liquid level sensor and one end abuts against the bottom of the second bracket, while the other end abuts against the inner wall of the housing.

[0015] As a further technical solution, the bottom end face of the second bracket has a recessed portion, and the end of the spring passes through the recessed portion.

[0016] As a further technical solution, the housing includes:

[0017] The body has a groove;

[0018] A screw sealing plate is disposed at the opening of the groove, and both the oil inlet and the oil outlet are located on the screw sealing plate;

[0019] The protective plate is fitted into the opening of the groove and contacts the screw plate. The protective plate and the first bracket cooperate to fix the screw plate.

[0020] As a further technical solution, a first sealing ring is also included. A receiving groove is also provided on the protective plate, and the first sealing ring is placed in the receiving groove. The first sealing ring and the screw sealing plate are located on both sides of the protective plate.

[0021] As a further technical solution, cylindrical protrusions are provided at both ends of the additive box, and second sealing rings are provided at the connection points of the cylindrical protrusions with the second bracket and the screw plate, respectively.

[0022] As a further technical solution, the end of the first bracket is provided with a liquid leakage protrusion, there are multiple liquid leakage protrusions and they are spaced apart, and the liquid leakage protrusions contact the screw plate.

[0023] As a further technical solution, the filter paper includes a first filter paper and a second filter paper. The first filter paper is wrapped around the outside of the additive box, and the second filter paper is wrapped around the outside of the second support. The filtration surface area of ​​the second filter paper is larger than that of the first filter paper.

[0024] The working principle and beneficial effects of this utility model are as follows: A filter for a methanol engine includes a housing, a first filter assembly, and a second filter assembly. The housing has an inner cavity and an oil inlet and an oil outlet at the top, both of which are connected to the inner cavity of the housing, where lubricating oil is filtered. The first filter assembly is located within the inner cavity and includes a first support and a moisture absorber. The first support divides the inner cavity into a first filter chamber and a second filter chamber. The moisture absorber is wrapped around the outside of the first support (i.e., lubricating oil flows through the moisture absorber from the first filter chamber to the second filter chamber) and is used to absorb moisture from the lubricating oil. The second filter assembly is located within the second filter chamber and includes filter paper, a second support, and an additive box. The second support isolates a third filter chamber within the second filter chamber. The additive box is mounted on the second support and has an oil passage. One end of the oil passage connects to the third filter chamber, and the other end connects to the oil outlet. The additive box has a filling chamber, a filling inlet, and a filling outlet. The filling chamber stores corrosion inhibitors. One end of the filling inlet connects to the inside of the filling chamber, and the other end connects to the outside of the additive box. One end of the filling outlet connects to the inside of the filling chamber, and the other end connects to the oil passage. Filter paper is wrapped around the outside of the additive box and the second support (i.e., lubricating oil can only flow through the filter paper to enter the third filter chamber and the oil passage from the second filter chamber). When lubricating oil flows into the first filter chamber from the inlet, it passes through the moisture adsorption element into the second filter chamber. Since the moisture adsorption element can adsorb the emulsified lubricating oil, water and lubricating oil are separated. The lubricating oil then passes through filter paper into the additive tank and the third filter chamber. The lubricating oil flowing through the additive tank carries corrosion inhibitors and mixes with the lubricating oil in the third filter chamber in the oil passage, finally flowing into the crankcase from the outlet. The lubricating oil to be filtered first undergoes separation of water and lubricating oil (i.e., changing the emulsion state) at the moisture adsorption element, and then impurities in the lubricating oil are filtered through the filter paper. Before flowing out of the outlet, the filtered lubricating oil carries some corrosion inhibitors because a portion of it flows through the additive tank, thus improving the lubrication quality of the lubricating oil. Attached Figure Description

[0025] The present invention will now be described in further detail with reference to the accompanying drawings and specific embodiments.

[0026] Figure 1 An isometric schematic diagram of the filter for a user's methanol engine provided by this utility model;

[0027] Figure 2 for Figure 1 Top view;

[0028] Figure 3 for Figure 2 A cross-sectional view after rotating point AA by a certain angle;

[0029] Figure 4 for Figure 1 A diagram from another angle;

[0030] Figure 5 for Figure 1 A schematic diagram of the structure in a semi-sectional state;

[0031] Figure 6 for Figure 5 A structural diagram from another angle;

[0032] Figure 7 for Figure 5 A structural diagram concealing the main body, the first sealing ring, and the protective plate;

[0033] Figure 8 for Figure 7 A structural diagram from another angle;

[0034] Figure 9 for Figure 7 A structural diagram showing the concealed screw plate and drainage components;

[0035] Figure 10 This is a schematic diagram of the structure at the junction of the second support and the additive box involved in this utility model.

[0036] In the picture:

[0037] 1. Housing; 2. First filter assembly; 3. Second filter assembly; 4. Drainage assembly; 5. First sealing ring;

[0038] 11. Body; 12. Threaded plate; 13. Protective plate; 14. Oil inlet; 15. Oil outlet; 16. First filter chamber; 17. Second filter chamber; 18. Third filter chamber;

[0039] 21. First support; 22. Moisture adsorption component; 23. Leakage protrusion;

[0040] 31. First filter paper; 32. Second filter paper; 33. Second support; 34. Additive box; 35. Oil passage; 36. Feeding inlet; 37. Feeding outlet; 38. Cylindrical protrusion; 39. Second sealing ring;

[0041] 41. Liquid level sensor; 42. Spring. Detailed Implementation

[0042] The technical solutions of this utility model will be clearly and completely described below with reference to the embodiments of this utility model. Obviously, the described embodiments are only some embodiments of this utility model, and not all embodiments. Based on the embodiments of this utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the scope of protection of this utility model.

[0043] like Figures 1-10 As shown, this embodiment proposes a filter for a methanol engine, comprising:

[0044] The housing 1 has an inner cavity, an oil inlet 14 and an oil outlet 15, both of which are connected to the inner cavity;

[0045] The first filter assembly 2 is located in the inner cavity. The first filter assembly 2 includes a first support 21 and a moisture adsorption element 22. The first support 21 separates the inner cavity into a first filter chamber 16 and a second filter chamber 17. The moisture adsorption element 22 wraps the first support 21 and is used to absorb moisture in the lubricating oil. The first filter chamber 16 is connected to the oil inlet 14.

[0046] The second filter assembly 3 is located inside the second filter chamber 17. The second filter assembly 3 includes filter paper, a second support 33, and an additive box 34. The additive box 34 has an oil passage 35. One end of the oil passage 35 is connected to the oil outlet 15, and the other end is connected to the inside of the second support 33. The filter paper wraps the outside of the second support 33 and the additive box 34. The second support 33 and the additive box 34 are separated into a third filter chamber 18 in the second filter chamber 17. The third filter chamber 18 is connected to the oil outlet 15. The additive box 34 has a filling chamber, a filling inlet 36, and a filling outlet 37. The filling inlet 36 is connected to the outside of the additive box 34 and the filling chamber, and the filling outlet 37 is connected to the filling chamber and the oil passage 35.

[0047] When the lubricating oil flows through the inside of the additive box 34, it carries the corrosion inhibitor into the oil passage 35.

[0048] In this embodiment, a filter for a methanol engine includes a housing 1, a first filter assembly 2, and a second filter assembly 3. The housing 1 has an inner cavity and an oil inlet 14 and an oil outlet 15 at the top, both of which connect to the inner cavity of the housing 1, allowing lubricating oil to be filtered within the inner cavity. The first filter assembly 2 is located within the inner cavity and includes a first support 21 and a moisture absorber 22. The first support 21 divides the inner cavity into a first filter chamber 16 and a second filter chamber 17. The moisture absorber 22 surrounds the first support 21 (i.e., lubricating oil flows through the moisture absorber 22 from the first filter chamber 16 to the second filter chamber 17) and is used to absorb moisture from the lubricating oil. The second filter assembly 3 is located within the second filter chamber 17 and includes filter paper, a second support 33, and an additive box 34. The second support 33 isolates a third filter chamber 18 within the second filter chamber 17. An additive box 34 is mounted on the second support 33. The additive box 34 has an oil passage 35, one end of which is connected to the third filter chamber 18, and the other end is connected to the oil outlet 15. The additive box 34 has a filling chamber, a filling inlet 36, and a filling outlet 37. The filling chamber stores corrosion inhibitors. One end of the filling inlet 36 is connected to the inside of the filling chamber, and the other end is connected to the outside of the additive box 34. One end of the filling outlet 37 is connected to the inside of the filling chamber, and the other end is connected to the oil passage 35. Filter paper is wrapped around the outside of the additive box 34 and the second support 33 (i.e., lubricating oil can only flow through the filter paper to enter the third filter chamber 18 and the oil passage 35 from the second filter chamber 17). When lubricating oil flows into the first filter chamber 16 from the oil inlet 14, it passes through the moisture adsorption element 22 and flows into the second filter chamber 17. Since the moisture adsorption element 22 can adsorb the lubricating oil in its emulsified state, water and lubricating oil can be separated. Then, the lubricating oil passes through the filter paper and enters the additive tank 34 and the third filter chamber 18 respectively. The lubricating oil flowing through the additive tank 34 carries corrosion inhibitors and mixes with the lubricating oil in the third filter chamber 18 in the oil passage 35, and finally flows into the crankcase from the oil outlet 15. The lubricating oil to be filtered first achieves separation of water and lubricating oil (i.e., changes the emulsified state) at the moisture adsorption element 22, and then filters impurities in the lubricating oil through the filter paper. Before flowing out of the oil outlet 15, the filtered lubricating oil carries some corrosion inhibitors because a portion of it flows through the additive tank 34, thereby improving the lubrication quality of the lubricating oil.

[0049] As the lubricating oil flows into the filter, water and lubricating oil mix together to form an emulsion-like state. In this state, water and oil do not separate. When the lubricating oil passes through the water absorption element 22 (e.g., non-woven fabric), the water is absorbed by the water absorption element 22. As the amount of water increases, it forms water droplets, which, under their own weight, enter the second filter chamber 17. At this point, although the second filter chamber 17 contains both water droplets and lubricating oil, they are no longer in an "emulsion" state but rather exhibit a clear "layered" state. In this state, water is below the second filter chamber 17, and lubricating oil is above the second filter chamber 17. Therefore, the effect of separating water from the lubricating oil is achieved, improving the quality of the filtered lubricating oil.

[0050] The additive involved in this invention is a commercially available product, and it is cylindrical with a volume larger than the size of the filling inlet and outlet. Furthermore, the additive is a combination of multiple components. Each time, the additive releases a certain amount of substance into the lubricating oil.

[0051] The additive is a mixture of antioxidants, detergents, dispersants, anti-wear agents, viscosity index improvers, rust and corrosion inhibitors, pour point depressants, antifoaming agents, friction modifiers, and extrusion agents. The specific types of each substance are shown below:

[0052] 1. Antioxidants: Phenolic compounds such as BHT and phenyl-α-naphthylamine

[0053] 2. Detergents and dispersants: calcium sulfonate, magnesium salicylate, polyisobutylene amine, polyester amine

[0054] 3. Anti-wear agents: organic molybdenum, borate esters

[0055] 4. Viscosity index improvers: polymethyl methacrylate, ethylene-propylene copolymer

[0056] 5. Rust and corrosion inhibitors: calcium sulfonate, organic amines, benzotriazole

[0057] 6. Pour point depressants: polyalphaolefin, polymethacrylate

[0058] 7. Antifoaming agents: polydimethylsiloxane, acrylate polymers

[0059] 8. Friction modifiers: molybdenum disulfide, glycerol esters, fatty acids

[0060] 9. Extreme pressure agents: sulfurized olefins, phosphate esters.

[0061] Furthermore, such as Figures 5-6 As shown, this embodiment proposes multiple feeding inlets 36 and multiple feeding outlets 37. The number of feeding inlets 36 is greater than the number of feeding outlets 37.

[0062] In this embodiment, since the corrosion inhibitor should not be added to the lubricating oil in large quantities, both the filling inlet 36 and the filling outlet 37 are configured as multiple small holes. This structure allows control over the amount of corrosion inhibitor entering the lubricating oil. To further improve the control over the amount of corrosion inhibitor, the number of filling inlets 36 is set to be greater than the number of filling outlets 37.

[0063] In one practical application, the number of feeding inlets 36 is 100-120 times the number of feeding outlets 37.

[0064] Furthermore, such as Figures 5-6 As shown, this embodiment also includes a drainage component 4, and the housing 1 further has a drain outlet that connects to the second filter chamber 17. The drainage component 4 includes:

[0065] Liquid level sensor 41 is installed at the drain outlet;

[0066] Spring 42 is located inside the second filter chamber 17. Spring 42 is sleeved on the outside of liquid level sensor 41 and one end abuts against the bottom of the second bracket 33, while the other end abuts against the inner wall of housing 1.

[0067] In this embodiment, after a period of use, water will accumulate inside the filter. To facilitate timely drainage, the filter for the methanol engine also includes a drainage assembly 4. A drain outlet is located at the bottom of the housing 1, connecting to the second filter chamber 17. The drainage assembly 4 includes a level sensor 41 and a spring 42. The inner wall of the drain outlet has threads, and the level sensor 41 also has threads. The level sensor 41 is fixed to the housing 1 via a threaded connection. The spring 42 is sleeved on the outside of the sensing end of the level sensor 41. One end of the spring 42 abuts against the second bracket 33, and the other end abuts against the inner wall of the second filter chamber 17. The spring 42 not only improves the tight connection between the various components within the second filter chamber 17, enhancing sealing, but also provides space for water accumulation. The level sensor 41 is electrically connected to an external controller. When the water level in the second filter chamber 17 reaches a certain height, the controller will issue a warning, allowing the operator to remove the level sensor 41 to drain the water from the second filter chamber 17.

[0068] Furthermore, such as Figures 5-6 As shown, in this embodiment, the bottom end face of the second bracket 33 has a recess, and the end of the spring 42 passes through the recess.

[0069] In this embodiment, in order to improve the stability of the thrust that the spring 42 can apply to the second bracket 33, a recess is provided on the bottom end face of the second bracket 33, and the end of the spring 42 passes through the recess. This structure can play a certain guiding role in the force transmitted by the spring 42.

[0070] Furthermore, such as Figure 3 As shown, this embodiment proposes that the housing 1 includes:

[0071] Body 11 has a groove;

[0072] The screw sealing plate 12 is set at the opening of the groove, and the oil inlet 14 and the oil outlet 15 are both located on the screw sealing plate 12;

[0073] The guard plate 13 is fitted into the opening of the groove and contacts the screw plate 12. The guard plate 13 and the first bracket 21 cooperate to fix the screw plate 12.

[0074] In this embodiment, to reduce the overall complexity of the equipment and facilitate subsequent maintenance, the housing 1 includes a body 11, a threaded plate 12, and a protective plate 13. The housing 1 has a groove, and the threaded plate 12 is disposed at the opening of the groove. The threaded plate 12 has an oil inlet 14 and an oil outlet 15. The cooperation between the threaded plate 12 and the body 11 forms an inner cavity, the oil inlet 14, and the oil outlet 15. The threaded plate 12 is disposed between the protective plate 13 and the body 11. The protective plate 13 is disposed at the opening of the groove and is used to cooperate with the first bracket 21 to fix the threaded plate 12. Simultaneously, the protective plate 13 also protects the threaded plate 12. The protective plate 13 is fixed to the body 11 by a snap-fit ​​connection, facilitating disassembly.

[0075] Furthermore, such as Figures 1-3 As shown, this embodiment also includes a first sealing ring 5, and a receiving groove is also provided on the protective plate 13. The first sealing ring 5 is placed in the receiving groove, and the first sealing ring 5 and the screw sealing plate 12 are located on both sides of the protective plate 13.

[0076] In this embodiment, since the filter provided by this utility model needs to be installed on the external structure through the mounting hole on the screw sealing plate 12 (this mounting hole is also the oil outlet 15), in order to improve the sealing between the filter and the external structure, a receiving groove is provided on the protective plate 13, and the first sealing ring 5 is set in the receiving groove. At the same time, the first sealing ring 5 also keeps in contact with the external structure, which improves the sealing between the filter and the external structure, thereby avoiding the outflow of lubricating oil and the contamination of the lubricating oil by external impurities.

[0077] Furthermore, such as Figures 5-10 As shown, this embodiment proposes that both ends of the additive box 34 are provided with cylindrical protrusions 38, and the cylindrical protrusions 38 are provided with second sealing rings 39 at the connection between them and the second bracket 33 and the screw plate 12, respectively.

[0078] In this embodiment, since the additive box 34 has an oil passage 35, and the lubricating oil in the third filter chamber 18 needs to enter the oil outlet 15 through the oil passage 35, in order to improve the sealing of this passage, cylindrical protrusions 38 are provided at both ends of the additive box 34. The cylindrical protrusions 38 facing the second bracket 33 penetrate into the third filter chamber 18 isolated by the second bracket 33, and a second sealing ring 39 is provided at the connection between the two. The cylindrical protrusions 38 facing the screw plate 12 are fitted at the mounting hole (oil outlet 15) of the screw plate 12.

[0079] Furthermore, such as Figures 3-9 As shown, in this embodiment, the end of the first bracket 21 is provided with a leakage protrusion 23. There are multiple leakage protrusions 23 and they are spaced apart. The leakage protrusions 23 contact the screw plate 12.

[0080] In this embodiment, the end of the first bracket 21 is provided with a leakage protrusion 23. There are multiple leakage protrusions 23 and they are spaced apart. The leakage protrusions 23 are in contact with the screw plate 12. The end face of the first bracket 21 is no longer in contact with the screw plate 12. The lubricating oil enters the inner cavity from the oil inlet 14 of the screw plate 12, and then flows into the first filter chamber 16 from the gaps between the leakage protrusions 23.

[0081] Furthermore, such as Figures 5-6 As shown, this embodiment proposes a filter paper including a first filter paper 31 and a second filter paper 32. The first filter paper 31 is wrapped around the outside of the additive box 34, and the second filter paper 32 is wrapped around the outside of the second support 33. The filtration surface area of ​​the second filter paper 32 is greater than that of the first filter paper 31.

[0082] In this embodiment, since the additive box 34 and the second support 33 are separate, the filter paper includes a first filter paper 31 and a second filter paper 32. The first filter paper 31 is wrapped around the outside of the additive box 34, and the second filter paper 32 is wrapped around the outside of the second support 33. The first filter paper 31 and the second filter paper 32 are separate. The first filter paper 31 and the second filter paper 32 have the same filtration properties, both of which are for adsorbing impurities in the lubricating oil.

[0083] In a practical application, the first filter paper 31 does not need to completely cover the additive box 34; it only needs to cover the surface with the filling inlet 36. Similarly, the second filter paper 32 does not need to completely cover the second support 33; it only needs to cover the opening portion of the second support 33, which connects the second filter chamber 17 and the third filter chamber 18.

[0084] It should be noted that the liquid level sensor involved in this utility model is a non-standard part, manufactured by Bengbu Wanda Electronics Co., Ltd., and the inventor also has pictures of the actual product.

[0085] The above are merely preferred embodiments of the present utility model and are not intended to limit the present utility model. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present utility model shall be included within the protection scope of the present utility model.

Claims

1. A filter for a methanol engine, characterized in that, include: The housing (1) has an inner cavity, an oil inlet (14) and an oil outlet (15), wherein the oil inlet (14) and the oil outlet (15) are both connected to the inner cavity; The first filter assembly (2) is located in the inner cavity. The first filter assembly (2) includes a first support (21) and a moisture absorber (22). The first support (21) separates the inner cavity into a first filter chamber (16) and a second filter chamber (17). The moisture absorber (22) wraps around the first support (21) and is used to absorb moisture. The first filter chamber (16) is connected to the oil inlet (14). The second filter assembly (3) is located inside the second filter chamber (17). The second filter assembly (3) includes filter paper, a second support (33) and an additive box (34). The additive box (34) has an oil passage (35). One end of the oil passage (35) is connected to the oil outlet (15), and the other end is connected to the interior of the second support (33). The filter paper wraps the exterior of the second support (33) and the additive box (34). The second support (33) and the additive box (34) isolate a third filter chamber (18) in the second filter chamber (17). The third filter chamber (18) is connected to the oil outlet (15). The additive box (34) has a filling chamber, a filling inlet (36) and a filling outlet (37). The filling inlet (36) is connected to the exterior of the additive box (34) and the filling chamber. The filling outlet (37) is connected to the filling chamber and the oil passage (35). When the lubricating oil flows through the interior of the additive box (34), it carries the corrosion inhibitor into the oil passage (35).

2. The filter for a methanol engine according to claim 1, characterized in that, There are multiple feeding inlets (36) and feeding outlets (37).

3. A filter for a methanol engine according to claim 2, characterized in that, The number of feeding inlets (36) is greater than the number of feeding outlets (37).

4. A filter for a methanol engine according to any one of claims 1-3, characterized in that, It also includes a drainage assembly (4), the housing (1) further having a drain outlet communicating with the second filter chamber (17), the drainage assembly (4) comprising: A liquid level sensor (41) is installed at the drain outlet; The spring (42) is located inside the second filter chamber (17). The spring (42) is sleeved on the outside of the liquid level sensor (41) and one end abuts against the bottom of the second bracket (33), and the other end abuts against the inner wall of the housing (1).

5. A filter for a methanol engine according to claim 4, characterized in that, The second bracket (33) has a recess on its bottom end face, and the end of the spring (42) passes through the recess.

6. A filter for a methanol engine according to any one of claims 1-3, characterized in that, The housing (1) includes: The body (11) has a groove; A screw sealing plate (12) is provided at the opening of the groove, and the oil inlet (14) and the oil outlet (15) are both located on the screw sealing plate (12); The guard plate (13) is fitted into the opening of the groove and contacts the screw plate (12). The guard plate (13) and the first bracket (21) cooperate to fix the screw plate (12).

7. A filter for a methanol engine according to claim 6, characterized in that, It also includes a first sealing ring (5), and the protective plate (13) is provided with a receiving groove. The first sealing ring (5) is placed in the receiving groove, and the first sealing ring (5) and the screw sealing plate (12) are located on both sides of the protective plate (13).

8. A filter for a methanol engine according to claim 6, characterized in that, Both ends of the additive box (34) are provided with cylindrical protrusions (38), and the cylindrical protrusions (38) are provided with second sealing rings (39) at the connection between them and the second bracket (33) and the screw plate (12).

9. A filter for a methanol engine according to claim 6, characterized in that, The first bracket (21) has a leaking protrusion (23) at its end. There are multiple leaking protrusions (23) and they are spaced apart. The leaking protrusions (23) contact the screw plate (12).

10. A filter for a methanol engine according to claim 6, characterized in that, The filter paper includes a first filter paper (31) and a second filter paper (32). The first filter paper (31) is wrapped around the outside of the additive box (34), and the second filter paper (32) is wrapped around the outside of the second support (33). The filtration surface area of ​​the second filter paper (32) is greater than that of the first filter paper (31).

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